OpenWRT WWAN / LTE modem

There are multiple modes for LTE modem operation:

QMI (NDIS) mode
- qmi protocol is a proprietary protocol by Qualcomm.
- Used for GL.iNet Spitz x750
- "Subjective, solution based on NDIS (QMI mode) works much stable. Faster reconnect. Easy to control and monitor."
NCM mode
RNDIS mode
AT command mode

QMI / NDIS modem setup

opkg update
opkg install usb-modeswitch kmod-mii kmod-usb-net kmod-usb-wdm kmod-usb-net-qmi-wwan uqmi luci-proto-qmi
reboot

ls -al /dev/cdc-wdm0
uqmi -d /dev/cdc-wdm0 --get-data-status
uqmi -d /dev/cdc-wdm0 --get-signal-info

QMI modem issues: